Elisha Gray

出典：ウィキメディア・コモンズ (Wikimedia Commons)
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English: Elisha Gray (1835 – 1901) invented the telephone in his laboratory in Highland Park, Illinois, independently of Alexander Graham Bell.
  • 1878
    1878
  • 1878
    1878
  • Sketched in the Popular Science Monthly
    Sketched in the Popular Science Monthly
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